Tetrabutylammonium Fluoride → HCID 56627540, compound

Participants

Reaction Steps

A solution of (3S,4S)-4-(1-ethoxycarbonylethyl)-3-(1-(R)-t-butyldimethylsilyloxyethyl)-1-t-butyldimethylsilyl-2-azetidinone (46.3 g) in dry tetrahydrofuran (60 ml) was treated with a 1M tetrahydrofuran solution of tetra-n-butylammonium fluoride (96 ml) at room temperature for 45 minutes. The reaction mixture was diluted with ethyl acetate (250 ml) and washed with brine (60 ml). The washing was extracted with ethyl acetate (50 ml). The extract and the ethyl acetate layer were combined together, washed with brine and dried over anhydrous sodium sulfate. Filtration and concentration of the filtrate in vacuo gave an oily residue, which was purified by silica gel chromatography to yield (3S,4S)-4-(1-ethoxycarbonylethyl)-3-(1-(R)-t-butyldimethylsilyloxyethyl)-2-azetidinone.

Provenance & Evidence